Cherne 285080 8" Aluminum Fin Set for SDR-35 Pipe

Features

• Lightweight, corrosion-resistant
• Field-verifiable without a proving ring
• Assembles without tools
• All sizes fit through standard 24" manhole
• Nine-fin design ensures testing accuracy
• Open design allows gravel and debris pass-through

Cherne's Fin Style Deflection Gauges are designed to be field verified by inspectors without the use of a proving ring. Simply place two fins end to end as pictured to the right and measure the width.

Add one inch to the mandrel and you have the outside dimension of the gauge. Using this method simplifies the inspector's job of verifying sizes on deflection gauges.